Improvement in milk-boilers



L. HENSEL. Milk-Boiler.

No. 2n,01 4. Patented Dec. 17,1878.

UNITED STATES LOUIS HENSEL, OF BERLIN, PRUSSIA, ASSIGNOR OF ONE-HALF HISRIGHT TO AUGUST KREFTER, OF SAME PLACE.

IMPROVEMENT lN MlLK-BOILERS.

Specification forming part of Letters Patent No. 211,034, dated December17, 1878 application filed October 16, 1878.

To an whom it may concern:

Be it known that I, Louis HENsEL, of Berlin, Prussia, have invented anImproved Milk- Boiler, of which the following is a specification:

Figure 1 is a vertical section of my improved milk-boiler; Fig. 2, a topview thereof; Fig. 3, a detail side view of the lock thereon; Fig. 4-,adetail section, on an enlarged scale, through the valve portion.

Similar letters of reference indicate corresponding parts in all thefigures.

The object of this invention is to prevent milk from boiling over, evenif left on the fire for an undue period, and to attain this end with theaid of a simple, inexpensive, and easily-cleaned apparatus.

The invention consists, principally, in pro viding the cover of theboiler with a downwardly-opening valve and with an upwardlyprojectingtube, said cover being at'a height below the top of the boiler, andlocked by peculiar means, as hereinafter more fully described.

In the accompanying drawings, the letter A represents the body of theboiler, made of sheet metal or other suitable material. At about themiddle of its height the boiler has an inwardly-projecting shoulder, a,which serves as a support for the movable cover B. The

cover B carries at its middle portion an upwardly-projecting tube, D,which is open at both ends, and preferably of truncated conical form.The upper end of the tube D is about on a level with the upper edge ofthe boiler. A short distance below its upper end the tube D has anoutwardly-pro}ecting shoulder, I).

The rim of the boiler A is at two points, that are diametricallyopposite each other, formed with L-shaped' incisions d (I. These slitsor incisions serve to receive and lock the ends of a oross-ban E, ofwhich the central portion forms an eye, 0, that is large enough toembrace the top of the tube D, but rests on the shoulder b, as shown.

The ends of the cross-bar B have suitable handles, so that it may beconveniently moved into or out of the slits (Z, to lock or unfasten thecover 13, as occasion may require.

Besides the central aperture that leads to the tube D, the cover B hasanother aperture, f, whose lower edge is formed to constitute a seat, g,for a fioat'va-lve, F. Said valve is contained within a wire cage, 71which is slid upon the annular flange that forms the valveseat 9, asshown in Fig. 4.

The operation is as follows: The cover Bis first secured in place bymeans of the crossbar E. Milk is then poured into the boiler until theportion below the cover B is wholly or partly filled. If there is muchmilk in the boiler, the float-valve will at once close the aperture f;but if the milk does not reach the valve the said aperture will remainopen. As soon as the milk commences to boil and to rise it will closethe aperture f by raising the float-valve, and will, as it can find noother escape, ascend in the tube D and'flow over the top thereofinto theupper part of the boiler, upon the cover 13. This part of the boilerbein g cooler, the violent boiling action will cease therein. Afterenough milk shall have entered the upper part of the boiler to outweighthe floating power of the milk below, the valve F will be forced down,permitting the milk from the upper compartment to flow into the lower.The valve thereupon again closes the aperture f, and the boiling processcontinues as before.

The parts can all be readily taken apart to be cleaned. The valve-cagecan be detached from the cover B to give access to the valve andvalveseat for cleaning purposes.

I claim as my invention- 1. The boiler A, combined with the cover B,having upwardly projecting open-ended tube D and downwardly-openin gvalve F be neath the aperture f, substantially as herein shown anddescribed.

2. The combination of boiler A, having the lock-notches d d, with theremovable cover B, having tube D, and with the cross-bar E, foroperation substantially as specified.

This specification signed by me this 21st day of August, 1878.

LOUIS HENSEL.

Witnesses CARL T. Bunnnnnn'r, AUGUST Knnrrnn.

